eBay has some for 25 bucks and free postage.
If someone sent an old one to Greg Claus, perhaps he can repro them cheaper?
https://www.ebay.com/itm/KAWASAKI-NOS-3 ... hd&vxp=mtr Part Number = 35039-003
Part Description = TAIL LAMP SHOCK DAMPER,35039-0O5
Model Count = 17
G4TR 70 100 100 TRAIL BOSS DUAL PURPOSE
C2SS N/A 120 C2SS 120 ROADRUNNER STREET
C2TR N/A 120 C2TR 120 ROADRUNNER STREET
F6 71 125 F6 125E ENDURO DUAL PURPOSE
F3 N/A 175 F3 175 BUSHWACKER DUAL PURPOSE
F7 71 175 175E ENDURO DUAL PURPOSE
A1 N/A 250 SAMURAI DUAL PURPOSE
A1SS N/A 250 SAMURAI SS DUAL PURPOSE
F4 N/A 250 F4 250 SIDEWINDER DUAL PURPOSE
A7 N/A 350 AVENGER DUAL PURPOSE
A7SS N/A 350 AVENGER SS DUAL PURPOSE
F9 72 350 F9 350 DUAL PURPOSE
H1B 72 500 H1 MACH III STREET W1 66 650 W1 COMMANDER STREET
W1SS 67 650 W1SS COMMANDER STREET
W2SS 68 650 W2SS COMMANDER STREET
W2TT 69 650 W2TT COMMANDER STREET